An exit poll is taken of 3000 voters in a statewide election. Let X denotes the number
Question:
a. Explain why this scenario would seem to satisfy the three conditions needed to use the binomial distribution. Identify n and p for the binomial.
b. Find the mean and standard deviation of the probability distribution of X.
c. Using the normal distribution approximation, give an interval in which you would expect X almost certainly to fall, if truly p = 0.50.
d. Now, suppose that the exit poll had x = 1706. What would this suggest to you about the actual value of p ?
Distribution
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Related Book For
Statistics The Art And Science Of Learning From Data
ISBN: 9780321755940
3rd Edition
Authors: Alan Agresti, Christine A. Franklin
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